That makes pretty much sense. Thanks for the reply. And sorry everyone for my "stupid question"...
case closed -- Hugo Leveille Compositing TD Vision Globale [email protected] Sent from my iPhone On Apr 21, 2011, at 10:34 PM, "Ned Wilson" <[email protected]> wrote: > So, after your read node, drop a grade node in the tree. Set the offset to > .03. This will make everything washed out, so set your gamma to, say, 0.8. > Season to taste with this. When you get it dialed, take the same grade node, > copy it, and paste it right before your write node. Open up the node to view > the properties, and put a check in the "reverse" box. > > When working with the footage, it's going to look slightly different than the > original plate, and a little lifted. This won't matter, you'll be reversing > the grade out at the end of your comp, so your VFX supe won't know the > difference, and your negative code values will be preserved. > > > On Apr 21, 2011, at 7:17 PM, Hugo Leveille wrote: > >> Degraining step involve more data on the server and quality loss at some >> point >> >> Might be acceptable on some project, but with some project where the vfx sup >> won't even watch the comp in dailies if there is a difference with the >> original plate (figurely speaking) it won't do it >> >> >> >> >> >> >> >> >> -- >> Hugo Leveille >> Compositing TD >> Vision Globale >> [email protected] >> >> Sent from my iPhone >> >> On Apr 21, 2011, at 10:08 PM, "Brad Friedman" <[email protected]> wrote: >> >>> Proper grain management includes a degraining step and a regrain step. >>> >>> On Apr 21, 2011, at 10:05 PM, chris <[email protected]> wrote: >>> >>>> On 4/21/11 at 3:18 AM, [email protected] (Brad Friedman) wrote: >>>>> You probably should not even be applying a grade node >>>>> before grain management. No sense color correcting values >>>>> that are chemical noise. The question is: what is your >>>>> d-min value after proper degraining? >>>> >>>> actually in this case we want to keep the grain, that's why >>>> it's shot on film ;) >>>> >>>> and i don't want to color correct it, i just want to keep it >>>> unaffected through the pipeline. obviously if the sub 95 >>>> values are clamped by the filmrecorder in the end, then this >>>> is a moot point (guess the only way to be sure is to ask the >>>> guys who are operating the recorder) ... but there are still >>>> situations where we want to keep the unclipped data, even if >>>> it's only grain texture (like adding a lens flare, which >>>> would bring up the sub 95 values to something visible). >>>> >>>> ++ chris >>>> >>>> ps: tried to build the pdx formulas in nuke if anybody is >>>> interested in playing around.. hope i didnt mess things up: >>>> >>>> set cut_paste_input [stack 0] >>>> push $cut_paste_input >>>> Expression { >>>> temp_name0 pdxLogReference >>>> temp_expr0 455 >>>> temp_name1 pdxDensityPerCodeValue >>>> temp_expr1 0.002 >>>> temp_name2 pdxNegativeGamma >>>> temp_expr2 0.6 >>>> temp_name3 pdxLinReference >>>> temp_expr3 0.18 >>>> expr0 "pow(10, ((red * 1023 - pdxLogReference) * >>>> pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" >>>> expr1 "pow(10, ((green * 1023 - pdxLogReference) * >>>> pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" >>>> expr2 "pow(10, ((blue * 1023 - pdxLogReference) * >>>> pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" >>>> name pdxLog2Lin >>>> selected true >>>> xpos -430 >>>> ypos -118 >>>> } >>>> Expression { >>>> temp_name0 pdxLogReference >>>> temp_expr0 455 >>>> temp_name1 pdxDensityPerCodeValue >>>> temp_expr1 0.002 >>>> temp_name2 pdxNegativeGamma >>>> temp_expr2 0.6 >>>> temp_name3 pdxLinReference >>>> temp_expr3 0.18 >>>> expr0 "(pdxLogReference + log10( max( red, 0.00000001 ) / pdxLinReference >>>> )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" >>>> expr1 "(pdxLogReference + log10( max( green, 0.00000001 ) / >>>> pdxLinReference )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" >>>> expr2 "(pdxLogReference + log10( max( blue, 0.00000001 ) / pdxLinReference >>>> )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" >>>> name pdxLin2Log >>>> selected true >>>> xpos -430 >>>> ypos -74 >>>> } >>>> >>>> _______________________________________________ >>>> Nuke-users mailing list >>>> [email protected] >>>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >>> _______________________________________________ >>> Nuke-users mailing list >>> [email protected] >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> _______________________________________________ >> Nuke-users mailing list >> [email protected] >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected] > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users _______________________________________________ Nuke-users mailing list [email protected] http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
